Middlings-purifier



M. J. ISGHOTT. Middlings Purifier.

UNITED STATES PATENT OFFIcE.

MARTIN J. SOHOTT, OF ROSOOE, OHIO, ASSIGNOR TO THE GEORGE T. SMITH MIDDLINGS PURIFIER COMPANY, OF JACKSON, MICHIGAN.

MIDDLINGS-PURIFIER.

SPECIFICATION formingpart of Letters Patent No. 241,514, dated May 17, 1881.

Application filed December 17, 1880.

To all whom it may concern Be it known that I, MARTIN JOHN ScHo'r'r, of Roscoe, in the county of Goshocton and State of Ohio, have invented a new and useful Improvement in Middlings-Purifiers, ofwhich the following is a specification.

This invention has for its object to produce a convenient means for stretching the cloths of the shaking-screens, such as are in common use in middlings-purifiers; but it is not intended that the scope of the patent shall be limited to this particular class of machines, as

it may be applied toscreens for other uses.

In the annexed drawings, making part of this specification, Figure 1 is a perspective view as seen from above the plane of the shaker; and Fig. 2 is a transverse section, the shaker being shown as turned bottom side up.

The same letters in both the figures indicate identical parts.

In the screen shown in the drawings I have shown the stretching device as attached to the shaker in common use, the frame being constructed'in the usual manner, with two side 2 5 bars, A A, and an end piece, A, of equal width, and having two bars, A placed respectively at the top and bottom of the side bars, at the tail end of the shaker. The cloth is tacked or 0therwise fastened to the top of the lower bar, A

so as to permit the free discharge of coarser particles passing over as tailings.

which the cloth may be tacked; and A are transverse braces placed above the cloth, to

'5 allow the material to run down the cloth beneath them.

The edges of the cloth are fastened to the side pieces, 0 O, and end piece, D. These pieces are attached to the frame, by hinges F,

40 at the edges opposite to that to which the cloth is fastened, and the position of the lower edge, to which the cloth is secured, is defined by the screw-bolts E, which are (in the case as illustrated) countersunk at the head in the frame,

4 5 and, passingthrough the swinging pieces, carry nuts, which restrict the movement of the latter, heldagainstsaid nuts bythe tensionof the cloth. By running the nuts down on the? bolts the cloth may be stretched to the desired degree.

In ordinary cases a play of half an inch will afiord the necessary variation of adjustment.

(No model.)

It is obvious that the swinging pieces may be" placed outside or inside the permanent frame, and that any other known adjusting device for holding the swinging pieces in place 5 5 may be substituted for the bolts and nuts. Thus set-screws tapped through the frame would hold the swinging pieces positively wherever they might be adjusted.

The end of the cloth, at the head, is fastened to the swinging piece D, which plays inside the side pieces, 0 G, and is similarly adjusted and confined, and intended to regulate the longitudinal tension of the cloth.

My invention is distinguished from the stretching devices heretofore employed in this, that the adjustable part of the frame is supported on hinges, so as to swing freely at the end to which the clothis secured. These hinges may be temporarily attached to any convenient bars or other supports and the cloth suitably stretched before being attached to the shakerframe. When this has been done thecloths may be packedfor shipment by rolling them around the swinging side pieces, and readily attached 7 5 to the shaker-frame in the machine by insertin g them through the usual openings in the side of the case and fastening the hinges in place by screws. In like manner the cloth can be taken out, when it requires to be renewed, without taking the shaker-frame out of the machine. A is a longitudinal bar, to the bottom of Whatl claim as my invention, and desire to secure by Letters Patent, is-- In combination with the cloth and permanentframe of a shakingscreen, swinging pieces hinged at one edge to the frame and having the cloth attached to the other, and screws or equivalent adjusting device for regulating the position of the free edge of the swinging pieces 0 and the tension of the cloth, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 7th day of December, 1880.

MARTIN JOHN S GHOTT.

Witnesses:

G. F. WILCOXON, W. J. CRAWFORD. 

